| PIN | SYGNAŁ |
| A | Chassis Ground |
| C | Request to Send |
| E | Data Set Ready |
| H | Data Terminal Ready |
| P | Ttansmitted Data (Signal A) |
| S | Transmitted Data (Signal B) |
| U | Terminal Timing |
| W | Terminal Timing |
| Y | Transmit Timing |
| B | Signal Ground |
| D | Clear to Send |
| F | Receive Line Signal Detect |
| J | Ring Indicator |
| R | Received Data (Signal A) |
| T | Received Data (Signal B) |
| V | Receive Timing A |
| X | Receive Timing |
| AA | Transmit Timing |